UNINSTALLED MODS
Auto Video Embed
Subforum Display Options
Breadcrumb microdata for phpBB3
phpBB [media]
phpBB Ajax Like
Country Flags User Edition
Profile comments
Board start date on index
NV usertopic
Topic Multi-Moderation
phpBB mChat
NV recent topics
phpBB SEO Optimal titles
Quick Title Edition
Ban List MOD
jQuery Pack for phpBB
Profile Guestbook
Simple Profile Comments
Auto Video Embed
Download Mod for phpBB
Instant Post Redirect
Hide Bots & Spiders
Profile Views List
Mobile phpBB 3
Auto Video Embed
User Mention MOD
Global Announcements on Index
DM Easy Download System
phpBB Country flags in posts based on ip (geoip)
Karma MODWhat styles do you currently have installed? custom (problem is not style related)What language(s) is your board currently using? englishWhich database type/version are you using? MariaDBWhat is your level of experience? Comfortable with PHP and phpBBWhat username can be used to view this issue?No answer givenWhat password can be used to view this issue?No answer givenWhat actions did you take (updating your board; installing a MOD, style or extension; etc.) prior to this problem becoming noticeable? I think after installing a MODPlease describe your problem. When minimum 2 users are online and logged in and they are browsing the forums, the cookies or smth is confused and first member got into second member account. The problem repairs itself after the first click you make, so if a user is logged in as me they can not acces the acp or sections they don't have permissions, but this should not happen...Generated by SRT Generator

We've seen problems like wrong sessions accidentally being assigned before when aggressive caching programs like Cloudfare are installed on the server. Could you ask your host if they use anything like this?

I don't think, but i will ask them.
If i think about it, the problem starts when i installed cloudflare myself, but after one day i changed back to normal for another reasons. It's a guess.. i don't know for sure